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    參數(shù)資料
    型號: 50.0MHZCFPT-9051HU1CLF
    廠商: C-MAC MICROTECHNOLOGY
    元件分類: TCVCXO, clock
    英文描述: TCVCXO, CLOCK, 50 MHz, HCMOS OUTPUT
    封裝: LEAD FREE, SMD, 6 PIN
    文件頁數(shù): 1/4頁
    文件大?。?/td> 62K
    代理商: 50.0MHZCFPT-9051HU1CLF
    SURF
    ACE
    MOUNT
    TCXOs
    CFPT-9050 Series
    ISSUE 6 ; 23 DECEMBER 2004
    Recommended for New Designs
    Delivery Options
    Please contact our sales office for current leadtimes
    Description
    A highly versatile series of surface mountable
    14.7 x 9.2 x 6.2mm temperature compensated voltage
    controlled crystal oscillators (TCVCXOs) for applications
    where small size and high performance are pre-
    requisites. This oscillator uses C-MAC’s latest custom
    ASIC "Pluto", a single chip oscillator and analogue
    compensation circuit, capable of sub 0.3 ppm
    performance. Its wide frequency range, operating
    temperature range, drive capability, coupled with its
    high stability and linear frequency pulling make it the
    ideal reference oscillator. Its ability to function down to
    a supply voltage of 2.4V and low power consumption
    makes it particularly suitable for mobile applications
    Standard Frequencies
    9.6, 10.0, 12.8, 19.44, 20.0, 38.88, 49.152, 51.84MHz
    Waveform
    Square HCMOS 15pF load
    Square ACMOS 50pF max. load
    Sinewave 10k
    // 10pF, AC-coupled
    Clipped sinewave 10k
    // 10pF, AC-coupled
    Supply Voltage
    Operating range 2.4 to 6.0V, see table
    Current Consumption
    HCMOS Typically
    1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10-3 mA
    e.g. 20MHz, 5V, 15pF
    4mA
    ACMOS Typically
    1+Frequency(MHz)*Supply(V)*{Load(pF)+23}*10-3 mA
    Sinewave, 6 to 12 mA depending on frequency
    Clipped Sinewave, Typically
    1+Frequency(MHz)*1.2*{Load(pF)+30}*10-3 mA
    Package Outline
    14.7 x 9.2 x 6.2mm SMD
    Ageing
    ±1ppm maximum in first year
    ±3ppm maximum for 10 years
    ±1ppm maximum after reflow
    Frequency Stability
    Temperature: see table
    Typical Supply Voltage Variation ±10% < ±0.2 ppm*
    Typical Load Coefficient 15pF ±5pF < ±0.2 ppm*
    * Depending on frequency and output type
    Frequency Adjustment
    Three options with external Voltage Control applied to
    pad 1:
    A - Ageing adjustment: > ±5ppm (Standard Option)
    B - No frequency adjustment. Initial calibration @ 25°C
    < ±0.5 ppm
    C - High Pulling ±10ppm to ±50ppm can be available
    depending on frequency and stability options.
    Please consult our sales office
    Linearity
    < 1%
    Slope
    Positive
    Input resistance
    > 100k
    Modulation bandwidth
    > 2kHz
    Standard control voltage ranges:
    Without reference voltage
    - Vs=5.0V 2.5V±2V
    Without reference voltage
    - Vs=3.3V 1.65V±1V
    With reference voltage
    - Vc=0V to Vref
    Reference Voltage, Vref (HCMOS/ACMOS only)
    Optional reference voltage output on pad 5, suitable for
    potentiometer supply or DAC reference.
    1. No output (standard option)
    2. 2.2V, for Min. Vs>2.4V
    3. 2.7V, for Min. Vs>3.0V
    4. 4.2V, for Min. Vs>4.5V
    Maximum load current (mA) = Vref /10
    For manual frequency adjustment (HCMOS/ACMOS output
    only) connect an external 50k
    potentiometer between
    pad 5 (Reference Voltage) and pad 3 (GND) with wiper
    connected to pad 1 (Voltage Control). Please specify
    reference voltage as a part of the ordering code
    Note: Please contact our sales office if a reference voltage
    is required in combination with sine or clipped sinewave
    output
    Tri-state
    Pad 2 open circuit or >0.6Vs output enabled
    < 0.2Vs Tri-state
    When Tri-stated, the output stage is disabled for all
    output options, but the oscillator and compensation
    circuit are still active (current consumption <1mA)
    Europe
    Tel: +44 (0)1460 270200
    Fax: +44 (0)1460 72578
    Website: www.cmac.com
    Americas Tel: +1 919 941 9333
    Fax: +1 919 941 9371
    Asia
    Tel: +86 755 8826 5991
    Fax: +86 755 8826 5990
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